Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-16 Thread Adam Forsyth
Can it be configured as a bridge without repeating the wireless signal?

I bought a VONETS VRP5G  to try before recommending a solution to the
student.  Maybe I haven't played with it enough yet, but my issue with it
is that it really seems to want to repeat the wireless signal and be a
range extender in addition to a bridge.  I liked its price and compact form
factor and that it was dual band, but I don't want to recommend anything
that's making its own interfering network.

On Thu, Sep 15, 2016 at 8:07 AM, Mark Usher  wrote:

> TP-Link N150 Wireless Travel Router is still the best bang for your buck
> at only $20.
>
> On Thu, Sep 15, 2016 at 8:57 AM, Norman Mourtada 
> wrote:
>
>> Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB
>> adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for
>> under 425 and seems to work great.
>>
>> Has support for both Windows and MacOS drivers.
>>
>>
>>
>> Norm
>>
>> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
>> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Adam Forsyth
>> *Sent:* Thursday, September 15, 2016 8:49 AM
>> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
>> *Subject:* [WIRELESS-LAN] Wireless to Wired Bridge
>>
>>
>>
>> Does anyone have a good wireless to wired bridge that they recommend to
>> students to purchase when they have a wired only device that they wish they
>> could connect in a wireless only residence hall?
>>
>>
>>
>> --
>>
>> *Adam Forsyth*
>>
>> Director of Network and Systems
>>
>> Luther College Information Technology Services
>>
>> 700 College Drive
>>
>> Decorah, IA 52101
>>
>> 563-387-1402
>>
>> ** Participation and subscription information for this EDUCAUSE
>> Constituent Group discussion list can be found at
>> http://www.educause.edu/groups/.
>> ** Participation and subscription information for this EDUCAUSE
>> Constituent Group discussion list can be found at
>> http://www.educause.edu/groups/.
>>
>>
>
>
> --
> *Mark Usher*
> Director of Infrastructure and Security
> Information Technology | 102 Patterson Hall
> Ashland, Ohio 44843
> 419.289.5882 <4192895882>
> mus...@ashland.edu
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>


-- 
*Adam Forsyth*
Director of Network and Systems
Luther College Information Technology Services

*700 College DriveDecorah, IA 52101563-387-1402*

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-16 Thread Adam Forsyth
For a laptop or a desktop I agree.  For this current application, the wired
only device is a blue-ray player, so it's not going to work with a usb
adaptor.

On Thu, Sep 15, 2016 at 7:57 AM, Norman Mourtada 
wrote:

> Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB
> adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for
> under 425 and seems to work great.
>
> Has support for both Windows and MacOS drivers.
>
>
>
> Norm
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Adam Forsyth
> *Sent:* Thursday, September 15, 2016 8:49 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Wireless to Wired Bridge
>
>
>
> Does anyone have a good wireless to wired bridge that they recommend to
> students to purchase when they have a wired only device that they wish they
> could connect in a wireless only residence hall?
>
>
>
> --
>
> *Adam Forsyth*
>
> Director of Network and Systems
>
> Luther College Information Technology Services
>
> 700 College Drive
>
> Decorah, IA 52101
>
> 563-387-1402
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>


-- 
*Adam Forsyth*
Director of Network and Systems
Luther College Information Technology Services

*700 College DriveDecorah, IA 52101563-387-1402*

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-16 Thread Hunter Fuller
I am using old Aironet 1131s for this. Convert them to autonomous and use
the 5GHz radio to associate. It is 802.11a, but this is fine for most
devices. If it needs higher bandwidth we urge the user to get a drop. (Our
residence halls have full wired coverage, so we are not running into this
issue there.)

On Fri, Sep 16, 2016 at 3:29 PM Robert Viou <robert.v...@ndsu.edu> wrote:

> Cisco access points are capable of configuring as a Workgroup bridge.
> I am using a 702W AP as it has wired ports to give locations wired access
> when there are no wired ports available.
> First need to convert a capwap AP into an autonomous AP and set it up to
> connect as a client to another AP, can be a capwap AP or another autonomous
> AP.
> Only one of the radios can be in wireless bridge mode. I chose the 5GHz
> radio.
>
> Here is a doc to use EAP-TLS to authenticate the AP, not complete but it
> does outline most of it.
> Can also set it up using WPA2 preshared key.
>
> http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/100864-wgb-eap-tls-cuwn.html
>
>
> http://www.cisco.com/c/en/us/support/docs/wireless/aironet-1200-series/68472-configure-wgb-00.html
>
>
> AP(config)#eap profile EAP
> AP(config)#method ?
>   fast  EAP-FAST method allowed
>   gtc   EAP-GTC method allowed
>   leap  EAP-LEAP method allowed
>   md5   EAP-MD5 method allowed
>   mschapv2  EAP-MSCHAPV2 method allowed
>   peap  EAP-PEAP method allowed
>   tls   EAP-TLS method allowed
>
>
>
>
>
>
> Robert Viou
> NORTH DAKOTA STATE UNIVERSITY
>
>
>
>
>
>
>
>
>
> -Original Message-
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Joachim Tingvold
> Sent: Thursday, September 15, 2016 9:21 AM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: Re: [WIRELESS-LAN] Wireless to Wired Bridge
>
> On 15 Sep 2016, at 14:49, Adam Forsyth wrote:
> > Does anyone have a good wireless to wired bridge that they recommend
> > to students to purchase when they have a wired only device that they
> > wish they could connect in a wireless only residence hall?
>
> For wired-to-wireless, we’ve had great success with “HP 501 Wireless
> Client Bridge” [1][2]. It has 802.11ac and supports 802.1X (including
> EAP-TLS). It can also be powered via PoE, but since we usually connect it
> directly to wired devices, we usually just power it with the included PSU.
> Not relevant for your use case, but it also has RS232-to-IP, which is
> useful for technical and/or medical equipment.
>
> It’s a bit pricey, but totally worth it for our use case.
>
>
> [1]
> <
> http://www8.hp.com/us/en/products/networking-wireless/product-detail.html?oid=6372587
> >
> [2]
> <
> http://h20565.www2.hpe.com/hpsc/doc/public/display?sp4ts.oid=6604155=en_US=emr_na-c04035081
> >
>
> --
> Joachim
>
> **
> Participation and subscription information for this EDUCAUSE Constituent
> Group discussion list can be found at http://www.educause.edu/groups/.
>
> **
> Participation and subscription information for this EDUCAUSE Constituent
> Group discussion list can be found at http://www.educause.edu/groups/.
>
>

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



RE: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-16 Thread Robert Viou
Cisco access points are capable of configuring as a Workgroup bridge. 
I am using a 702W AP as it has wired ports to give locations wired access when 
there are no wired ports available.
First need to convert a capwap AP into an autonomous AP and set it up to 
connect as a client to another AP, can be a capwap AP or another autonomous AP.
Only one of the radios can be in wireless bridge mode. I chose the 5GHz radio.

Here is a doc to use EAP-TLS to authenticate the AP, not complete but it does 
outline most of it.
Can also set it up using WPA2 preshared key.
http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/100864-wgb-eap-tls-cuwn.html

http://www.cisco.com/c/en/us/support/docs/wireless/aironet-1200-series/68472-configure-wgb-00.html


AP(config)#eap profile EAP
AP(config)#method ?
  fast  EAP-FAST method allowed
  gtc   EAP-GTC method allowed
  leap  EAP-LEAP method allowed
  md5   EAP-MD5 method allowed
  mschapv2  EAP-MSCHAPV2 method allowed
  peap  EAP-PEAP method allowed
  tls   EAP-TLS method allowed






Robert Viou 
NORTH DAKOTA STATE UNIVERSITY


 






-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Joachim Tingvold
Sent: Thursday, September 15, 2016 9:21 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Wireless to Wired Bridge

On 15 Sep 2016, at 14:49, Adam Forsyth wrote:
> Does anyone have a good wireless to wired bridge that they recommend 
> to students to purchase when they have a wired only device that they 
> wish they could connect in a wireless only residence hall?

For wired-to-wireless, we’ve had great success with “HP 501 Wireless Client 
Bridge” [1][2]. It has 802.11ac and supports 802.1X (including EAP-TLS). It can 
also be powered via PoE, but since we usually connect it directly to wired 
devices, we usually just power it with the included PSU. Not relevant for your 
use case, but it also has RS232-to-IP, which is useful for technical and/or 
medical equipment.

It’s a bit pricey, but totally worth it for our use case.


[1]
<http://www8.hp.com/us/en/products/networking-wireless/product-detail.html?oid=6372587>
[2]
<http://h20565.www2.hpe.com/hpsc/doc/public/display?sp4ts.oid=6604155=en_US=emr_na-c04035081>

--
Joachim

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread James Helzerman
Hi.  We have used this:

http://www.silexamerica.com/products/connectivity-solutions/wireless-infrastructure/ethernet-to-wi-fi-bridges/sx-br-4600wan2/

We only had it in use for a few days with an ip camera but it seemed to
work.  I was able to get out on 802.1x network and it supported 5ghz.

Jimmy

On Sep 15, 2016 10:46 AM, "Patterson, Chad"  wrote:

> We’ve been experimenting with the ubiquiti  picostation m2, but so far
> with no success. The issue we are having is with radius certificates, but
> depending on the auth method you are using it might be a viable option for
> your residence halls.
>
>
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Adam Forsyth
> *Sent:* Thursday, September 15, 2016 8:49 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Wireless to Wired Bridge
>
>
>
> Does anyone have a good wireless to wired bridge that they recommend to
> students to purchase when they have a wired only device that they wish they
> could connect in a wireless only residence hall?
>
>
>
> --
>
> *Adam Forsyth*
>
> Director of Network and Systems
>
> Luther College Information Technology Services
>
> 700 College Drive
>
> Decorah, IA 52101
>
> 563-387-1402
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Joachim Tingvold

On 15 Sep 2016, at 14:49, Adam Forsyth wrote:
Does anyone have a good wireless to wired bridge that they recommend 
to
students to purchase when they have a wired only device that they wish 
they

could connect in a wireless only residence hall?


For wired-to-wireless, we’ve had great success with “HP 501 Wireless 
Client Bridge” [1][2]. It has 802.11ac and supports 802.1X (including 
EAP-TLS). It can also be powered via PoE, but since we usually connect 
it directly to wired devices, we usually just power it with the included 
PSU. Not relevant for your use case, but it also has RS232-to-IP, which 
is useful for technical and/or medical equipment.


It’s a bit pricey, but totally worth it for our use case.


[1] 

[2] 



--
Joachim

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.


Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Jason Watts

Does that unit have an 802.1x supplicant in the manufacturer firmware or can it 
be flashed with OpenWRT or DDWRT? Or are you just joining it to open or PSK 
nets?



> On Sep 15, 2016, at 9:07 AM, Mark Usher  wrote:
> 
> TP-Link N150 Wireless Travel Router is still the best bang for your buck at 
> only $20.
> 
> On Thu, Sep 15, 2016 at 8:57 AM, Norman Mourtada  > wrote:
> Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB 
> adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for 
> under 425 and seems to work great.
> 
> Has support for both Windows and MacOS drivers.
> 
>  
> 
> Norm
> 
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU 
> ] On Behalf Of Adam Forsyth
> Sent: Thursday, September 15, 2016 8:49 AM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU 
> 
> Subject: [WIRELESS-LAN] Wireless to Wired Bridge
> 
>  
> 
> Does anyone have a good wireless to wired bridge that they recommend to 
> students to purchase when they have a wired only device that they wish they 
> could connect in a wireless only residence hall?
> 
>  
> 
> --
> 
> Adam Forsyth
> 
> Director of Network and Systems
> 
> Luther College Information Technology Services
> 
> 700 College Drive
> 
> Decorah, IA 52101
> 
> 563-387-1402 
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found at 
> http://www.educause.edu/groups/ .
> 
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found at 
> http://www.educause.edu/groups/ .
> 
> 
> 
> 
> -- 
> Mark Usher
> Director of Infrastructure and Security
> Information Technology | 102 Patterson Hall
> Ashland, Ohio 44843
> 419.289.5882 
> mus...@ashland.edu 
> 
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found at 
> http://www.educause.edu/groups/ .
> 


**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



RE: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Patterson, Chad
We’ve been experimenting with the ubiquiti  picostation m2, but so far with no 
success. The issue we are having is with radius certificates, but depending on 
the auth method you are using it might be a viable option for your residence 
halls.

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Adam Forsyth
Sent: Thursday, September 15, 2016 8:49 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless to Wired Bridge

Does anyone have a good wireless to wired bridge that they recommend to 
students to purchase when they have a wired only device that they wish they 
could connect in a wireless only residence hall?

--
Adam Forsyth
Director of Network and Systems
Luther College Information Technology Services
700 College Drive
Decorah, IA 52101
563-387-1402
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/.

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Mark Usher
TP-Link N150 Wireless Travel Router is still the best bang for your buck at
only $20.

On Thu, Sep 15, 2016 at 8:57 AM, Norman Mourtada 
wrote:

> Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB
> adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for
> under 425 and seems to work great.
>
> Has support for both Windows and MacOS drivers.
>
>
>
> Norm
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Adam Forsyth
> *Sent:* Thursday, September 15, 2016 8:49 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Wireless to Wired Bridge
>
>
>
> Does anyone have a good wireless to wired bridge that they recommend to
> students to purchase when they have a wired only device that they wish they
> could connect in a wireless only residence hall?
>
>
>
> --
>
> *Adam Forsyth*
>
> Director of Network and Systems
>
> Luther College Information Technology Services
>
> 700 College Drive
>
> Decorah, IA 52101
>
> 563-387-1402
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>


-- 
*Mark Usher*
Director of Infrastructure and Security
Information Technology | 102 Patterson Hall
Ashland, Ohio 44843
419.289.5882 <4192895882>
mus...@ashland.edu

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



RE: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Norman Mourtada
Oops meant under $25 not 425

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Norman Mourtada
Sent: Thursday, September 15, 2016 8:58 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Wireless to Wired Bridge

Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB 
adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for under 
425 and seems to work great.
Has support for both Windows and MacOS drivers.

Norm
From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Adam Forsyth
Sent: Thursday, September 15, 2016 8:49 AM
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [WIRELESS-LAN] Wireless to Wired Bridge

Does anyone have a good wireless to wired bridge that they recommend to 
students to purchase when they have a wired only device that they wish they 
could connect in a wireless only residence hall?

--
Adam Forsyth
Director of Network and Systems
Luther College Information Technology Services
700 College Drive
Decorah, IA 52101
563-387-1402
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/.
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/.

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



RE: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Norman Mourtada
Why not use a Wi-Fi usb adapter? I just tested the EDIMAX AC600 Wi-Fi USB 
adapter model EW-7811UTC is a dual band (2.4/5) and supports 802.11AC for under 
425 and seems to work great.
Has support for both Windows and MacOS drivers.

Norm
From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Adam Forsyth
Sent: Thursday, September 15, 2016 8:49 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless to Wired Bridge

Does anyone have a good wireless to wired bridge that they recommend to 
students to purchase when they have a wired only device that they wish they 
could connect in a wireless only residence hall?

--
Adam Forsyth
Director of Network and Systems
Luther College Information Technology Services
700 College Drive
Decorah, IA 52101
563-387-1402
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/.

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.



Re: [WIRELESS-LAN] Wireless to Wired Bridge

2016-09-15 Thread Sweetser, Frank E
It never went into production for other reasons, but I had very good results 
testing out Moxa bridges for use with some of our robotics programs.  They'll 
even take certs for EAP-TLS!


http://www.moxa.com/product/Industrial_Wireless_LAN.htm


Frank Sweetser
Director of Network Operations
Worcester Polytechnic Institute
"For every problem, there is a solution that is simple, elegant, and wrong." - 
HL Mencken



From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
 on behalf of Adam Forsyth 

Sent: Thursday, September 15, 2016 8:49 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless to Wired Bridge

Does anyone have a good wireless to wired bridge that they recommend to 
students to purchase when they have a wired only device that they wish they 
could connect in a wireless only residence hall?

--
Adam Forsyth
Director of Network and Systems
Luther College Information Technology Services
700 College Drive
Decorah, IA 52101
563-387-1402
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/.

**
Participation and subscription information for this EDUCAUSE Constituent Group 
discussion list can be found at http://www.educause.edu/groups/.